(!!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1964-1968 (9.2/11.2ma and 10.2/11ma)
(!!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 same date codes (11.8/12ma and 11/12.2ma)
(!!!!) (Best GE Pair) 6BQ7A GE NOS "O" getter halo 1975-1976 (8.0/8.6ma and 8.3/8.3ma) (Schiit, DNA, Modwright)
(!) (Single) 5BK7A GE gray plates "U" getter NOS 1973 (8.5/11ma)
(!) (Single) 5BK7A GE gray plates "U" getter NOS 1964 (7.5/10.5ma)
(!) (PAIR) 5BQ7A Dumont by GE gray plates NOS 1973 (8.3/8.0ma and 8.6/9.8ma)
(!) (PAIR) 5BQ7A Dumont by GE gray plates NOS 1973 "U" and "O" getter (7.0/7.4ma and 7.0/6.6ma)
5BQ7A RCA branded Raytheon black plates "D" getter faded printing 1950's (14.0/13.6ma)
5BQ7A GE black plates "U" getter 1961 (10.8/7.0ma)
(!!!) (Recommended Single) 6BK7A Raytheon black plates NOS "D" getter 1950's (7.2/8.2ma) (great sub for 6N1P)
(!!!) (Recommended Single) 6BQ7A RCA black plates NOS 1962 (10/14ma)
(!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 (16.5/14ma and 15.5/18ma)
(!!!) (Best Single) 6BQ7A RCA black plates NOS 1964 (13.2/14.2ma)
(!!!!) (Single) 6BK7B RCA NOS "U" getter 1950's (7.5/8.5ma)
(!!!!) (Best Pair) 6BQ7A RCA black plates NOS 1967 same date codes (15/14.5ma and 13.5/16.5ma)
(!!!) (Best Single) 6BQ7A RCA black plates NOS 1967 (11.5/13.5ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates "U" getter NOS 1957 (9.0/9.4ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates large "O" getter NOS 1965 (13.0/14.2ma)
(!!!!) (GE Pair) 6BQ7A GE NOS "O" getter halo 1978-1980 (8.4/11.8ma and 9.4/11.0ma) (Schiit, DNA, Modwright)
